Scripts for website monitoring using Python

gistfile1.py

#!/usr/bin/env python

# Sample usage: checksites.py eriwen.com nixtutor.com ... etc.

import pickle, os, sys, logging
from httplib import HTTPConnection, socket
from smtplib import SMTP

def email_alert(message, subject='You have an alert'):
    fromaddr = '[email protected]'
    toaddrs = '[email protected]'
    
    server = SMTP('smtp.gmail.com:587')
    server.starttls()
    # I encourage you to get this from somewhere more secure
    server.login('gmailuser', 'password')
    server.sendmail(fromaddr, toaddrs, message)
    server.quit()

def is_url_reachable(url):
    '''Make HEAD request to url'''
    try:
        conn = HTTPConnection(url)
        conn.request("HEAD", "/")
        if conn.getresponse().status != 200:
            return False
        return True
    except socket.error:
    	# Server is up but connection refused
    	return False
    except:
        logging.error('Bad URL:', url)
        raise
        
def get_headers(url):
    '''Gets all headers from URL request and returns'''
    try:
        conn = HTTPConnection(url)
        conn.request("HEAD", "/")
        response = conn.getresponse()
        return response.getheaders()
    except socket.error:
    	return 'Headers unavailable'
    except: 
        logging.error('Bad URL:', url)
        raise

def is_internet_reachable():
    '''Checks Google then Yahoo just in case one is down'''
    if not is_url_reachable('www.google.com') and not is_url_reachable('www.yahoo.com'):
        return False
    return True
    
def load_old_results(file_path):
    '''Attempts to load most recent results'''
    pickledata = {}
    if os.path.isfile(file_path):
        picklefile = open(file_path, 'rb')
        pickledata = pickle.load(picklefile)
        picklefile.close()
    return pickledata
    
def store_results(file_path, data):
    '''Pickles results to compare on next run'''
    output = open(file_path, 'wb')
    pickle.dump(data, output)
    output.close()
    
def main(args):
    # Setup logging to store time
    logging.basicConfig(level=logging.WARNING, filename='checksites.log', 
            format='%(asctime)s %(levelname)s: %(message)s', 
            datefmt='%Y-%m-%d %H:%M:%S')
    
    # Load previous data
    pickle_file = 'data.pkl'
    pickledata = load_old_results(pickle_file)
        
    # Check sites only if Internet available
    if is_internet_reachable():
        # First arg is script name, skip it
        for url in args[1:]:
            available = is_url_reachable(url)
            status = '%s is down' % url
            if available:
                status = '%s is up' % url
            # Print status for those just running without automation
            print status
            if url in pickledata and pickledata[url] != available:
                # Email status messages
                logging.warning(status)
                email_alert(str(get_headers(url)), status)
            pickledata[url] = available
    else:
        logging.error('Either the world ended or we are not connected to the net.')
        
    # Store results in pickle file
    store_results(pickle_file, pickledata)

if __name__ == '__main__':
    main(sys.argv)

I am new to python. Can this script send an email when the site is down?

I am new to python. Can this script send an email when the site is down?

yes it does send email when the website is down

can this script check the total active users on the website??

can this script check the total active users on the website??

nope

can this script monitor HTTPS connections also?

what is we have multiple websites to moniot at a time?how can we do it with this script